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9 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Relative Time |
Place date of events in order of occurrence (which came first,second,and so on) |
What do you put in order |
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Uniformitarianism |
Processes in the past happend the same way that they do today |
Happened in a UNIFORM manner |
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Law of original horizontality |
Layers of sediment our originally deposited horizontally under the action of gravity |
Pay attention for key words |
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The law of superposition |
In a sequence of undisturbed sedimentary rocks (the youngest rocks will be at the top) |
Break the word down to two. |
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Absolute Time |
Assigns the exact date to an event (often requires technology and lab work) |
Exact-absolute |
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The law of cross-cutting relationships |
When any feature cuts across layers of rocks, the feature is younger than the rocks it cuts across |
Pay attention to the words |
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Law of inclusions |
If one rock body contains another rock body it must be younger than the fragments of rock it contains. Or... The inclusions are older than the rocks which contain them |
Pay attention to the words |
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Index Fossils |
Existed In the wide area but only for a short time |
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Unconformities |
"Buried erosional surfact," which means that it was a surfact that once got erotend and then buried by new layers |
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